Thermo-electric couple.



UNHED STAT Pii'ttihlll (EFFMIE.

ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

THERMQsELEGTQlG COUPLE.

Specification of Letters Yetent.

Patented June 3.9, 1908.

Application filed August 7. 1905. Serial No. 273,216.

To {ZZZ whom it ntay concern:

Be it known that I, HARRY E. HEATH, a citizen of the United States, residing at Lynn, county of Essex, and State of Massachusetts, have invented certain new and useful improvements in Thermo-Electrio Couples, of which the following is a s ecification.

My resent invention re ates to a combinetion otdiiierent materials for use as a thermoelectric couple. This couple comprises as one of its elements a member made of silicon, preferably cast into the desired shape. The silicon member may be in the form of a rod, sheet, or bar, and associated with this bar to form the other member of the couple I use one of a number of suitable metalssuch, for

example, as copper, nickel, or the like. The joints between the two members may be made, for example, by casting the nickel or other metal about one end of the silicon rod, or, if desired, the nickel or copper in the form of wiremay'be Wound tightly about one end of the silicon rod. As many couples of this a volt.

character as may be desired may be used in series with each other or in any other connec tion understood by electrical engineersv The couple which I have described possesses the important advantage of high electromotive force. W 1th a rise in temperature of about 680 cent-grade the eleotromotive force of the couple amounts to about .25 of heat-refractory material and may to advam ta e be submltted to hlgh temperatures.

What I cl'alm as new, and desire to secure The silicon, moreover, is a highly by Letters Patent of the United States, is 1. A thermo-eleotrlc couple one member oi Y 

